Interference Source Positioning Method of Satellites Based on Adaptive Mesh Refinement
Aiming at the problem of low positioning accuracy and high computational complexity with the direct positioning method with fixed grid resolution to position satellite navigation interference sources,a direct positioning method of adaptive mesh refinement is proposed.Firstly,the differential matching filter is used to obtain the rough estimate of TOA,the positioning area is narrowed,and the ini-tial interference source position is obtained by coarse estimation,and then the iterative mesh refinement is used to obtain the high-precision positioning result.Simulation results show that the positioning accu-racy of this method can be improved by 90％compared with the traditional two-step positioning under the condition of low signal-to-noise ratio;at 20 m grid resolution,the computational complexity is reduced by 24 times compared with the DPD positioning method.
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